JP2010228021A - Punching device and punching method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a punching device which can manufacture stacked sheet products (including film products) with high efficiency. <P>SOLUTION: A punching die 31 comprises an edge 32 having an edge 32b which is abutted against a sheet S1 and faces upward. An inner periphery 32a located at a side lower than the edge 32b is located at an inner side rather than the edge 32b. The punching die further comprises bases 33, 34. In the bases, inner peripheries 33a, 34a at a side lower than the edge 32 are located at an outer side rather than the inner periphery 32a of the edge 32. A punching device 1 comprises a product stacking table 38 disposed below a die hole C1, a punching means 50 that punches a sheet product S3 from the sheet S1, a knockout means 60 that stacks the sheet product S3 on the product stacking table 38 by lowering a lower end 65 of a knockout member 64 which can be moved forward and backward to the die hole C1 from above the sheet product to the lower side of the cutting part 32 to lower the sheet product S3, and a stacked product transfer means 70 which moves the sheet product S3 stacked on the product stacking table 38 to a predetermined takeout position L2. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a punching apparatus and a punching method for punching and stacking sheet products from sheets (including films).

  As a method of punching film products such as beverage labels and cap seals, a large number of cut films that are roughly cut larger than the film products are prepared, and these cut films are stacked and sandwiched between plastic plates, and the cut film laminate is pressed. There is a so-called bushing method in which a punching die is passed by a machine. In this method, cut films are stacked manually and sandwiched between plastic plates, and the laminate of cut films is set on a guide plate of a press.

  Further, Patent Document 1 describes a punching device in which a punching station and an extraction station are provided at different locations. The punching station of this punching device punches a large number of sheet products with a punching die from a long material sheet conveyed in the horizontal direction. The punching die is arranged below the conveyance area of the material sheet, and by pressing the blade part at the peripheral edge of the die hole penetrating vertically into the material sheet, sheet products are sequentially punched from the material sheet into the die hole. Housed in a stacked state. At the upper position facing the punching die at the punching station, a pusher pusher for pushing the punched sheet product into the die hole is provided. The take-out station takes out the sheet product punched by the punching die. The take-out station is provided with an extrusion pusher for pushing out the sheet product group accommodated in the laminated state from the mold hole to the take-out portion.

FIG. 30 shows the main part of the punching station described in Patent Document 1. As shown in the figure, the punching die 920 includes a Thomson hollow blade 922 and a blade holder 921. The blade holder 921 includes a blade cover 921a and a slide block 921b. A large-diameter hole 923 for tightly fitting the Thomson hollow blade 922 penetrates the blade cover 921a vertically. A small-diameter hole 924 having the same planar shape as the inner peripheral shape of the Thomson hollow blade 922 penetrates the slide block 921b vertically. Accordingly, the lower edge 922a of the Thomson hollow blade 922 is positioned on the upper surface of the slide block 921b.
A large number of sheet holders 907 are provided in such a manner that flexible elastic fins 908 are vertically aligned on a rectangular parallelepiped base block. An upper end 907 a of the sheet holder 907 is located above the lower edge 922 a of the Thomson hollow blade 922.

An annular blade receiver 936 having elasticity is detachably provided on the lower surface of the mold receiver 930. An elevating shaft 970 of a pusher pusher is inserted in a through hole 926 formed in the mold receiver 930 and the fixed plate 925 so as to be movable up and down. A pressing plate 971 is fixed to the lower end of the lifting shaft 970. When the pushing pusher pushes the sheet product 990 into the mold cavity 980, the lower limit position of the lower surface 971a of the pressing plate 971 is around the upper end 907a of the sheet holder 907, that is, the lower edge of the Thomson hollow blade 922, as shown in FIG. It is above the portion 922a. As a result, the sheet product 990 is held by the sheet holder 907 and stacked inside the Thomson hollow blade 922.
When the punching die 920 is transferred from the punching station to the take-out station, the stacked sheet products 990 are pushed out from the die holes 980 to the product take-out conveyor.

JP 2006-192513 A

  The punching apparatus described above, when punching a film product from an extremely thin sheet such as a film, is the top when the pressing plate 971 is retracted upward from the mold cavity 980 despite the presence of the sheet holder 907. Sheet product 991 may return to the upper side of the Thomson hollow blade 922. When a new sheet product is punched from the sheet in this state, the edge of the previously punched sheet product 991 is cut. For this reason, the troublesome operation | work except the sheet | seat product from which the edge part was cut | disconnected is needed.

  In view of the above, an object of the present invention is to efficiently manufacture stacked sheet products (including film products).

In order to achieve the above object, the present invention carries a sheet (including a film) continuous in the conveying direction to a punching position between a lower punching die and an upper receiving part, and a sheet product is transferred from the sheet. A punching device for punching and stacking,
The punching die has a mold hole through which the sheet product passes vertically,
The punching die is
A blade part whose upper edge is directed to the upper side and whose inner periphery below the blade edge is set to the inner side of the blade edge; and
The inner periphery below the blade portion has a base portion that is outside the inner periphery of the blade portion, and
This punching device
A product stack placed below the mold cavity;
A punching means for separating the punching die and the receiving portion, carrying the sheet into the punching position, and punching the sheet product from the sheet at the punching position by bringing the punching die and the receiving portion close to each other. When,
A knockout member which can be moved back and forth with respect to the mold cavity from above the sheet product, and lowering the lower end of the knockout member to the lower side of the blade portion to lower the sheet product and thereby the product stacking base Knock-out means stacked on top,
And a stacked product transfer means for moving the sheet product stacked on the product stack to a predetermined take-out position.

Further, the present invention is a punching method in which a sheet (including a film) continuous in the conveying direction is carried to a punching position between a lower punching die and an upper receiving part, and sheet products are punched from the sheet and stacked. A method,
A blade part in which a die hole penetrating vertically through the sheet product is provided in the punching die, a blade edge for contact with the sheet is directed upward, and an inner periphery below the blade edge is set inside the blade edge Is provided in the punching die, and a base is provided in the punching die whose inner periphery is lower than the inner periphery of the blade part,
Place a product stack under the mold cavity,
The punching die and the receiving portion are separated from each other, the sheet is carried into the punching position, the punching die and the receiving portion are brought close to each other, and the sheet product is punched from the sheet at the punching position. The sheet product is lowered by lowering the lower end of a knockout member that can be moved back and forth with respect to the mold cavity from the top of the product to the lower side of the blade portion, and is stacked on the product stacking base. The sheet product stacked on the top is moved to a predetermined take-out position.

When the sheet product is punched from the sheet at the punching position, the lower end of the knockout member is lowered to the lower side of the blade portion, whereby the sheet product is lowered and stacked on the product stacking table. That is, in the present invention, the sheet products are not held by the holder in the punching die, but the sheet products are sequentially stacked on the product stacking table. The stacked sheet products are moved to a predetermined take-out position.
The blade portion has an inner circumference below the blade edge and inside the blade edge. On the other hand, the base of the punching die has an inner circumference that is lower than the blade portion and is outside the inner circumference of the blade portion. Therefore, when the lower end of the knockout member is lowered to the lower side of the blade portion, the sheet product is difficult to return toward the blade portion.

In the present invention, the sheet includes a film.
To separate the die and the receiving part, move both the die and the receiving part to release them, move the die away from the receiving part without moving the receiving part, or move the punching die. Without separating the receiving part from the punching die. To move the die and the receiving part close to each other, move both the die and the receiving part to bring them closer together, move the punching die to the receiving part without moving the receiving part, or move the punching die. Without moving the receiving part closer to the punching die.
The blade part and the base part in the punching die may be formed by separate members or may be integrated members.

According to the invention which concerns on Claim 1, the punching apparatus which can manufacture the stacked sheet product efficiently can be provided.
In the invention which concerns on Claim 2, the freedom degree of the taking-out position of the stacked sheet product can be improved.
In the inventions according to claims 3 and 8, the stacked state of the sheet products can be more reliably maintained.

The invention according to claims 4 and 5 can provide a suitable example in which stacked sheet products can be efficiently manufactured.
In the invention according to claim 6, since the sheet products stacked a predetermined number of times move to the take-out position, the convenience can be improved.
In the invention which concerns on Claim 7, a sheet | seat product can be stacked on a product stacking stand, without bending.

In the invention which concerns on Claim 9, the suitable example which can utilize the space below the product stacking board for sheet | seat product discharge | emission can be provided.
In the invention which concerns on Claim 10, the punching precision of a sheet product can be improved.
In the invention which concerns on Claim 11, the punching precision of a sheet product can be improved when conveying both the edge parts of the width direction of a sheet | seat.

In the invention which concerns on Claim 12, the punching precision of the sheet | seat product in the width direction of a sheet | seat can be improved.
In the invention which concerns on Claim 13, the punching precision of the sheet product in the conveyance direction of a sheet | seat can be improved.
In the invention which concerns on Claim 14, the punching method which can manufacture the stacked sheet product efficiently can be provided.

1 is a front view illustrating an outline of a punching device 1. FIG. 2 is a plan view illustrating an outline of the punching device 1. FIG. 3 is a front view illustrating a sheet supply unit 2. FIG. 6 is a plan view illustrating a state in which the sheet S1 is supplied from the sheet supply unit 2 to the conveying unit 52. FIG. It is a top view which illustrates the mode of sheet S1 which passes punching position L1. 4 is a perspective view illustrating a main part of a conveying means 52. FIG. 4 is a front view illustrating the crank mechanisms 35 and 45. FIG. It is a rear view which illustrates crank mechanisms 35 and 45. It is a vertical sectional view which illustrates a punching position L1 and the principal part of punching device 1 of the circumference in a section view. 3 is a vertical cross-sectional view illustrating the main part of the punching die 31 in a cross-sectional view. FIG. It is a figure which illustrates typically the size of the inner circumference of punching die 31. It is a top view which illustrates the lower table 30 which assembled | attached the product stacking board 38. FIG. It is the vertical table which illustrates the lower table 30 which assembled the product stacking base 38, and the lower part. It is the vertical table which illustrates the lower table 30 which assembled the product stacking base 38, and the lower part. It is a figure which illustrates a mode that the product stacking base is assembled | attached to the lower table. 4 is a plan view illustrating a main part of the lower table 30 to which the product stacking base 38 is assembled. FIG. 2 is a block diagram illustrating an outline of an electric circuit configuration of the punching device 1. FIG. 2 is a block diagram illustrating an electric circuit configuration of the punching device 1. FIG. 3 is a flowchart illustrating a setting process of the punching device 1. 4 is a flowchart illustrating a manufacturing process of the punching device 1. 4 is a flowchart illustrating a manufacturing process of the punching device 1. 4 is a flowchart illustrating a manufacturing process of the punching device 1. 3 is a vertical cross-sectional view illustrating the main part of the punching device 1 when the upper and lower molds 31 and 41 are close to each other. FIG. It is a vertical sectional view which illustrates the principal part of punching device 1 at the time of knockout. 3 is a vertical cross-sectional view illustrating the main part of the punching device 1 when the upper and lower molds 31 and 41 are separated from each other. FIG. It is a vertical sectional view which illustrates the principal part of punching device 1 at the time of knockout. FIG. 6 is a vertical sectional view illustrating the main part of the punching device 1 when the lower end 65 of the knockout member 64 passes through the mold cavity C1. FIG. 5 is a vertical sectional view illustrating the main part of the punching device 1 when the product stacking base 38 is lowered to a lower position L7. FIG. 10 is a vertical cross-sectional view illustrating a main part of a punching die 131 according to a modified example in a cross-sectional view. It is a vertical sectional view showing a main part of a punching device of a conventional example. It is a vertical sectional view showing a main part of a punching device of a conventional example.

(1) Outline of punching device:
1 and 2 schematically show a punching device 1 according to an embodiment of the present invention. The punching device 1 of the present embodiment includes a sheet supply unit 2, a punching unit 3, a product take-out unit 7, and a scrap collection unit 9, and is punched between a lower punching die 31 and an upper receiving unit 41. The continuous sheet S1 is carried in the pulling position L1 in the transport direction D1, and the sheet product S3 is punched from the sheet S1 and stacked. The scrap collection unit 9 collects the punched scrap sheet S2. In this specification, a sheet is thin and generally refers to a flat sheet whose thickness is small with respect to length and width, and includes a film. The film refers to a thin flat film whose thickness is extremely small compared to the length and width and whose maximum thickness is arbitrarily limited, and the thickness is usually less than 0.25 mm.

The basic part of the punching apparatus 1 includes a punching die 31, a receiving die (receiving portion) 41, a product transfer conveyor (product stacking base) 38, a punching means 50, a knockout means 60, and a stacked product transferring means 70. .
As shown in FIG. 10, the punching die 31 includes a punching blade (blade portion) 32 and base portions 33 and 34, and a die hole C1 through which the sheet product S3 passes is vertically penetrated. The punching blade 32 has a cutting edge 32b to be applied to the sheet S1 facing upward, and an inner periphery 32a below the cutting edge 32b is set inside the cutting edge 32b. In the base portions 33 and 34, inner peripheries 33 a and 34 a below the blade portion 32 are outside the inner perimeter 32 a of the blade portion. Here, the inner side or the outer side of the inner periphery means the inner side or the outer side with the mold cavity C1 as the center.
As shown in FIG. 9, the receiving die 41 includes a receiving die main body 42 and a blade receiver 43, and receives the cutting edge 32b of the punching blade 32 at the time of punching.

As shown in FIG. 9, the product transfer conveyor 38 is disposed below the mold cavity C1.
The punching means 50 separates the punching die 31 and the receiving die 41, carries the sheet S1 into the punching position L1, and brings the punching die 31 and the receiving die 41 close to each other from the sheet S1 at the punching position L1. Product S3 is punched out.
As shown in FIG. 9, the knockout means 60 has a knockout member 64 that can be advanced and retracted from the top of the sheet product S3 with respect to the mold cavity C1. As shown in FIG. 24, the knockout means 60 lowers the lower end 65 of the knockout member 64 to the lower side of the punching blade 32, thereby lowering the sheet product S <b> 3 and stacking it on the product transfer conveyor 38. That the lower end 65 of the knockout member is below the punching blade 32 means that the lower end 65 is lowered beyond the lower edge 32c of the punching blade 32, and the lower end 65 is below the punching blade. As long as it falls over the edge 32c, most of the knockout member 64 may be above the lower edge 32c of the punching blade.
Here, the lower inner periphery 32a of the punching blade 32 is set to the inner side of the cutting edge 32b, and the inner periphery 33a, 34a of the punch base is set to the outer side of the inner periphery 32a. The sheet product S3 is unlikely to return toward the punching blade 32 because 65 moves down below the lower edge 32c of the punching blade 32.

  The stacked product transfer means 70 moves the sheet product S3 stacked on the product transfer conveyor 38 to a predetermined take-out position L2.

(2) Explanation of sheet:
As the sheet S1, a resin sheet such as a synthetic resin sheet, a paper sheet, or the like can be used. The sheet S1 may be a printed sheet on which a pattern is printed, or may be a sheet on which printing is not performed. The resin sheet may be a sheet made of only a resin such as a thermoplastic resin, a sheet made of a material in which an additive such as a filler is added to the resin, a single layer sheet, or a laminated sheet laminated with different materials. . As a material for the thermoplastic resin sheet, polyethylene, polypropylene, polystyrene, polyvinyl chloride, acrylonitrile butadiene styrene (ABS) resin, polyethylene terephthalate, polycarbonate, or the like can be used. The thickness of the sheet can be various thicknesses such as about 1 to 2 mm, about 0.25 to 1 mm, and about 0.05 to 0.25 mm. As in the present embodiment, when the sheet S1 is rolled, it is suitable for continuously punching sheet products.
The sheet product S3 may be a film product, a paper product, or the like used for a label of a container such as a food container.

  As shown in FIG. 4, the sheet S1 of the present embodiment is a print sheet on which a pattern S11 corresponding to the label of the container is printed, and is conveyed in the conveyance direction D1 with the printing surface facing upward. Further, lead wires S12 and S12 directed in the longitudinal direction of the sheet S1 are printed in the vicinity of both edge portions S1a and S1a of the sheet S1. The lead wires S12 and S12 are used to align the position in the width direction D2 of the sheet S1. Further, a mark S13 is printed at a position corresponding to each pattern S11 arranged in the transport direction D1 of the sheet S1. The mark S13 is used to adjust the position in the transport direction D1 of the sheet S1 carried into the punching position L1, and when the sheet S1 carried into the punching position L1 deviates beyond the reference in the width direction D2. It is used to stop the punching of the sheet product S3. The mark S13 may have a cross shape shown in FIG. 4 or another shape.

(3) Description of the sheet supply unit 2:
For example, the sheet supply unit 2 unwinds and supplies the roll-shaped sheet S <b> 1 to the clamp chain (conveying means) 52. As shown in FIG. 3, the sheet supply unit 2 of the present embodiment includes a tension holding device 21, and includes a sheet edge position detection sensor (sheet edge position detection means) 24 and a width direction position adjustment means 25. Yes. The width direction position adjusting means 25 includes a controller 26 and a centering mechanism 27.
The tension holding device 21 includes a roller 22 including a dancer roller 23, and reduces a change in tension of the sheet S1 unwound from the roll. The tension holding device 21 is movable in the sheet width direction D2.

  The sheet edge position detection sensor 24 is disposed above the edge S1a of the sheet S1 before being held by the clamp chain 52, and detects the position of the edge S1a in the width direction D2. The sensor 24 of the present embodiment detects the position in the width direction D2 of the lead wire S12 printed on the upper surface of the sheet S1, and outputs a signal representing the position in the width direction D2 of the lead wire S12 to the controller 26.

The width direction position adjusting means 25 adjusts the position YM in the width direction D2 of the sheet S1 to be held by the clamp chain 52 within the reference based on the position of the sheet edge S1a detected by the sensor 24. Based on the signal from the sensor 24, the controller 26 sends a command to the centering mechanism 27 to move the tension holding device 21 in the width direction D2 to a position where the position YM of the lead wire S12 in the width direction D2 is within the reference in the width direction D2. Output. The centering mechanism 27 moves the tension holding device 21 in the width direction D2 in accordance with a signal from the controller 26. For example, the allowable range with respect to the reference position Y0 in the width direction D2 of the sheet S1 is ± Y1 (Y1> 0), and the deviation YM−Y0 in the width direction D2 of the lead wire S12 detected by the sensor 24 is ΔY. In this case, the position in the width direction D2 of the sheet S1 is within the reference, which is −Y1 ≦ ΔY ≦ Y1. When the position of the sheet S1 in the width direction D2 is out of the reference, that is, ΔY <−Y1 or Y1 <ΔY, the controller 26 outputs a command for moving the tension holding device 21 in the width direction D2 to the centering mechanism 27. do it. Then, the position in the width direction D2 of the sheet S1 held by the clamp chain 52 is adjusted within the reference.
When detecting the positions of the lead wires S12 and S12 in the vicinity of both edge portions S1a and S1a, for example, the tension holding device 21 may be moved in the width direction D2 by averaging the shift between the two positions.

  When transporting while holding both edges in the width direction of the sheet, it is not easy to adjust the position of the sheet in the width direction while holding both edges of the sheet. Since the punching apparatus adjusts the position in the width direction of the sheet before holding both edges of the sheet, the punching accuracy of the sheet product S3 can be improved.

(4) Description of the transport means 52:
The clamp chain (conveying means) 52 of the present embodiment is provided in the vicinity of both edge portions S1a and S1a of the sheet S1 and the scrap sheet S2 before punching, and both edge portions S1a and S1a in the width direction D2 of the sheets S1 and S2. Holding S1a, the sheet is intermittently conveyed in the conveyance direction D1 passing through the predetermined punching position L1. That is, the clamp chain 52 is intermittently driven according to the control of the control panel 10, stops the conveyance of the sheets S 1 and S 2 when the upper and lower tables 30 and 40 are close to each other, and the both tables 30 and 40 are separated from each other. Sometimes punched sheets S1, S2 for one shot are conveyed in the conveying direction D1.

  As shown in FIG. 6, each clamp chain 52 has a clamp mechanism 53 attached to an attachment portion of an outer link 52c of an endless chain 52b. The endless chain 52b is driven around by a conveying motor 52a shown in FIG. The transport motor 52a is a servo motor, and intermittently drives the endless chain 52b according to the control of the control panel 10. The clamp mechanism 53 includes a pedestal 53a, a tilting member 53b, a cylindrical support shaft member 53c, a roller 53d, and tension coil springs 53e and 53e. The pedestal 53a fixed to the attachment portion places the edge portion S1a of the sheets S1 and S2. The tilting member 53b has a protrusion 53b1 facing the upper surface 53a1 of the pedestal 53a, and is attached so as to be tiltable with respect to the shaft 53a2 of the pedestal 53a. The support shaft member 53c protrudes upward from the upper surface of the tilting member 53b. The roller 53d is rotatably attached to the distal end portion of the support shaft member 53c. The springs 53e and 53e are coil springs having one end attached to the pedestal 53a and the other end attached to the tilting member 53b in a state where the springs 53e and 53e are pulled against the elastic force, and bias the tilting member 53b in the direction in which the tilting member 53b is raised.

  When no rollers are in contact with each other, the protrusion 53b1 of the tilting member protrudes from the upper surface 53a1 of the pedestal on which the sheet edge S1a is placed, and the sheet edge S1a is held between the clamp mechanisms 53. On the other hand, at a position where the sheet S1 is carried into the clamp chain 52 and a position where the scrap sheet S2 is released from the clamp chain 52, a wall portion 53z that pushes the roller 53d and tilts the tilting member 53b is provided. As a result, both edge portions S1a and S1a of the sheet are held at the position where they are carried into the clamp chain 52, and both edge portions S1a and S1a of the scrap sheet are released at a position where they are released from the clamp chain 52.

For example, when a sheet is transported by a driving roller in the transport direction passing through the punching position, a scrap sheet in which a punch hole of the sheet product is generated tends to be pulled in the transport direction and contracted in the width direction. As a result, if the sheet before punching shrinks in the width direction, the positioning accuracy at the punching position is lowered. The punching device 1 of the present embodiment holds the both edge portions of the sheet with the clamp mechanism and conveys the sheet, so that the positioning accuracy at the punching position can be made high, and the punching accuracy of the sheet product can be improved. Can be improved.
The mechanism for holding the edge of the sheet may be a spike holding mechanism that pierces and holds the edge of the sheet with a spike member, in addition to the clamp mechanism.

(5) Description of the punching part 3:
As shown in FIG. 9, the punching unit 3 includes a lower table 30 that can be moved up and down with a punching die 31 fixed on the upper side, and a receiving die (receiving part) 41 fixed on the lower part. The upper table 40 that can be moved up and down is provided above the punching position L1. Thereby, both the tables 30 and 40 can be moved toward and away from the vertical direction D3, and the upper and lower molds 31 and 41 can be moved toward and away from the vertical direction D3.
The lower table 30 is formed with an elevating space SP1 for the product transfer conveyor 38, and the product transfer conveyor 38 is assembled in the elevating space SP1 so as to be movable up and down. A plate-like attachment member 30b for attaching a mechanism for raising and lowering the product transfer conveyor 38 is provided at a portion of the lower table 30 in the width direction D2 facing the elevation space SP1. The product transfer conveyor 38 moves up and down together with the lower table 30 when the lower table 30 moves up and down, and can be moved up and down relatively with respect to the lower table 30. The elevating space SP1 is connected to the mold hole C1 of the punching die 31.
The upper table 40 is provided with a lifting space SP2 for the knockout member 64, and the knockout member 64 is provided so as to be movable up and down with respect to the lifting space SP2. Therefore, the knockout member 64 moves up and down together with the upper table 40 when the upper table 40 moves up and down, and can be moved up and down relative to the upper table 40. The elevating space SP2 is connected to the mold hole C2 of the receiving mold 41, and is connected to the mold hole C1 of the punching mold 31 at the time of knockout.

The punching die 31 of the present embodiment includes a punching blade (blade part) 32 provided corresponding to each sheet product S3 punched at the punching position L1, a holding member 33 that holds each punching blade 32, and all A common mold base 34 that holds the holding member 33 is provided. Here, the holding member 33 and the mold base 34 serve as a base of a punching die for the blade portion.
As each punching blade 32, a Thomson blade or the like for pushing through the sheet S1 can be used. As shown in FIG. 11, the punching blade 32 is formed in a cylindrical shape that matches the shape of the sheet product S3. Specifically, the cutting edge 32b of the punching blade 32 has an annular shape that matches the size of the sheet product S3. The cutting edge 32b is directed upward at a position surrounding the sheet product S3, and the inner periphery expands outward and the outer periphery contracts inward. Therefore, in the punching blade 32, the inner periphery 32a below the blade edge 32b is set to the inner side than the blade edge 32b. The deviation between the cutting edge 32b and the inner periphery 32a of the lower part can be variously set, and can be set to, for example, 0.1 to 2 mm (more preferably 0.2 to 1 mm). Of course, various settings can be made for the deviation between the cutting edge 32b and the outer periphery 32d of the lower portion, for example, 0.1 to 2 mm (more preferably 0.2 to 1 mm). The punching blade 32 shown in FIG. 10 is disposed such that the inner periphery 32a and the outer periphery 32d below the cutting edge 32b are vertical surfaces, and the lower edge 32c is a horizontal surface. Since the inner periphery of the cutting edge 32b is formed in a tapered surface shape that expands upward, the sheet product S3 punched by the cutting edge 32b is press-fitted into the mold cavity C1 of the punching blade 32 portion. Become.

  In each holding member 33, a blade holding surface 33b for holding the outer periphery 32d of the punching blade 32 is formed on the upper side of the inner peripheral portion, and the lower side of the blade holding surface 33b is set as the inner periphery 33a of the punching die base portion. A mold cavity C1 is formed, and a step portion 33c is formed between the blade holding surface 33b and the inner periphery 33a. The holding member 33 shown in FIG. 10 is arranged so that the blade holding surface 33b and the inner periphery 33a are vertical surfaces, and the stepped portion 33c is arranged in a horizontal plane. The punching blade 32 is held by the holding member 33 in a state where the lower edge 32c is abutted against the stepped portion 33c and the outer periphery 32d is in contact with the blade holding surface 33b. The width (the length in the horizontal direction) of the stepped portion 33c is smaller than the thickness of the punching blade 32, and is a width corresponding to the thickness from the outer periphery 32d of the punching blade 32 to the blade edge 32b. Therefore, the inner periphery 32a of the punching blade is on the inner side of the inner periphery 33a of the punching die base, and the outer periphery 32d of the punching blade is on the outer side of the inner periphery 33a of the punching die base.

The mold base 34 is formed with a plurality of mold holes C1 corresponding to the punching blades 32 and attached to the upper surface of the lower table 30. The holding member 33 is attached to the upper surface of the die base 34 by aligning the die holes C1 of the holding members 33 with the die holes C1. The mold base 34 shown in FIG. 10 has a vertical surface in which the inner periphery 34a is aligned with the inner periphery 33a of the holding member. Therefore, the inner periphery 34a of the die base is outside the inner periphery 32a of the punching blade below the cutting edge 32b.
The deviation between the inner peripheries 33a, 34a of the base and the inner perimeter 32a of the punching blade can be variously set, for example, 0.1 to 2 mm (more preferably 0.2 to 1 mm).

The bases 33 and 34 of the punching die shown in FIG. 10 have such a size that the inner peripheries 33a and 34a below the punching blade 32 are surrounded by the blade tip 32b. Accordingly, the sheet product S3 can be stacked on the product transfer conveyor 38 without bending, and the sheet product S3 can be stacked with high accuracy. Of course, as shown by the two-dot chain line in FIG. 11, the bases 33 and 34 of the punching die may be larger than the size of the inner circumferences 33a and 34a below the punching blade 32 surrounded by the cutting edge 32b. Good. Also in this case, the sheet product S3 can be stacked on the product transfer conveyor 38 without bending.
In addition, each part of the die 31 can be formed, for example, mainly by processing a metal. Here, if the punching blade 32 is made of a metal material having a relatively high hardness, the durability can be improved, and if the base portions 33 and 34 are made of a metal material having a relatively low hardness such as an aluminum alloy, the processing is easy. Can be made.

As shown in FIG. 9, the receiving die 41 of the present embodiment is a blade receiver for bringing the cutting edge 32 b of the punching blade into contact with the receiving die main body 42 attached to the lower surface of the upper table 40 and the tables 30 and 40. 43.
The receiving mold main body 42 is formed with a plurality of mold holes C <b> 2 corresponding to the knockout members 64 and attached to the lower surface of the upper table 40. The mold cavity C2 is sized to allow the knockout member 64 to pass therethrough. The receiving mold main body 42 can be formed by, for example, mainly processing metal.
The blade receiver 43 is formed in an annular shape corresponding to the cutting edge 32 b of the punching blade, and is attached to the lower surface of the receiving die main body 42. As the blade receiver 43, for example, a synthetic resin molded product, a synthetic rubber molded product, a processed metal product having a relatively low hardness such as an aluminum alloy, or the like can be used.

  As shown in FIGS. 2, 7, and 8, the punching unit 3 drives the crank mechanisms 35 and 45 for raising and lowering the tables 30 and 40, and drives the crank mechanisms 35 and 45 to raise and lower the tables 30 and 40. Crank motors (crank driving means) 36 and 46 are provided.

The lower crank mechanism 35 includes a driving side crankshaft 35a, driven side crankshafts 35b and 35c, driving side connecting rods 35d and 35e, and driven side connecting rods 35f and 35g. Here, the crankshaft is a member that is provided with a crank pin eccentric from the main shaft portion and to which a connecting rod is rotatably attached via a connecting rod bearing.
The drive-side crankshaft 35a is displaced from the lower side of the product transfer conveyor 38 (punching position L1) in the transport direction D1 and is arranged with the longitudinal direction directed toward the sheet width direction D2. In FIG. 7, the lower side of the product transfer conveyor 38 is indicated by a two-dot chain line, and the drive-side crankshaft 35a is installed at a position L11 that is shifted from the lower side of the product transfer conveyor 38 to the upstream side in the sheet conveyance direction D1. It has been shown.

The first driven-side crankshaft 35b and the second driven-side crankshaft 35c are moved from the lower side of the product transfer conveyor 38 (punching position L1) to both positions L12 outside the sheet width direction D2, respectively. It is arranged toward D2.
As shown in FIG. 7, the first drive side connecting rod 35d is spanned between the drive side crankshaft 35a and the first driven side crankshaft 35b. Specifically, one end of the connecting rod 35d is rotatably attached to the crank pin 35a1 of the drive side crankshaft 35a via a bearing in the vertical plane, and the other end of the connecting rod 35d is a first driven member via the bearing. It is attached to the crank pin 35b1 of the side crankshaft 35b so as to be rotatable in a vertical plane.
As shown in FIG. 8, the second drive side connecting rod 35e is spanned between the drive side crankshaft 35a and the second driven side crankshaft 35c. Specifically, one end of the connecting rod 35e is rotatably attached to the crank pin 35a1 of the driving side crankshaft 35a via a bearing in the vertical plane, and the other end of the connecting rod 35e is second driven via the bearing. The crankshaft 35c1 of the side crankshaft 35c is attached to be rotatable in a vertical plane.

As shown in FIG. 7, the first driven connecting rod 35 f is spanned between the first driven crankshaft 35 b and the lower table 30. Specifically, one end of the connecting rod 35f is rotatably attached to the crank pin 35b2 of the first driven crankshaft 35b via a bearing, and the other end of the connecting rod 35f is lowered via the bearing. It is attached to the front part of the table 30 so as to be rotatable in a vertical plane.
As shown in FIG. 8, the second driven connecting rod 35 g is spanned between the second driven crankshaft 35 c and the lower table 30. Specifically, one end of the connecting rod 35g is attached to the crank pin 35c2 of the second driven crankshaft 35c via a bearing so as to be rotatable in a vertical plane, and the other end of the connecting rod 35g is lowered via the bearing. The table 30 is attached to the back surface portion so as to be rotatable in a vertical plane.

The lower crank motor (lower crank driving means) 36 is a servo motor, and drives the drive-side crankshaft 35 a to move up and down the lower table 30 under the control of the control panel 10. The state shown in FIG. 7 is a state where the tables 30 and 40 are close to each other. When the motor 36 rotates the drive side crankshaft 35a clockwise within a predetermined angle (for example, 90 °) in FIG. 35b and 35c also rotate clockwise, and lower table 30 is lowered. When the motor 36 rotates the drive-side crankshaft 35a counterclockwise within a predetermined angle (for example, 90 °) in FIG. 7 with the lower table 30 lowered, the driven-side crankshafts 35b and 35c also rotate counterclockwise. The lower table 30 is raised.
If the crankshaft spanned in the width direction of the seat is below the lower table, the motor for driving the crankshaft also needs to be arranged below the lower table. In this case, it is not easy to provide a structure for discharging the stacked sheet products from under the lower table. In this embodiment, since the crankshaft spanned in the width direction of the sheet is arranged so as to be shifted from the lower side of the product transfer conveyor in the sheet transfer direction, the space below the product transfer conveyor is used for discharging the sheet product. Can do.

On the other hand, the upper crank mechanism 45 includes portions 45 a to 45 g that are substantially upside down with respect to the lower crank mechanism 35.
That is, the drive-side crankshaft 45a is displaced from the upper side of the knockout member 64 to the upstream side in the conveyance direction D1, and is arranged with the longitudinal direction directed toward the sheet width direction D2. The first driven-side crankshaft 45b and the second driven-side crankshaft 45c are respectively arranged in the positions in the width direction D2 of the seat from both above the knockout member 64 and outside the width direction D2 of the seat. . One end of the first drive side connecting rod 45d is attached to the crank pin 45a1 of the drive side crankshaft 45a via a bearing so as to be rotatable in a vertical plane, and the other end is connected to the first driven side crank via the bearing. The shaft 45b is attached to the crankpin 45b1 so as to be rotatable in a vertical plane. One end of the second drive side connecting rod 45e is rotatably attached to the crank pin 45a1 of the drive side crankshaft 45a via a bearing, and the other end is connected to the second driven side crank via the bearing. The shaft 45c is attached to the crank pin 45c1 so as to be rotatable in a vertical plane. One end of the first driven side connecting rod 45f is attached to the crank pin 45b2 of the first driven side crankshaft 45b via a bearing so as to be rotatable in a vertical plane, and the other end is attached to the upper table 40 via a bearing. It is attached so that it can rotate in a vertical plane with respect to the front part of the. One end of the second driven side connecting rod 45g is attached to the crank pin 45c2 of the second driven side crankshaft 45c via a bearing so as to be rotatable in a vertical plane, and the other end is connected to the upper table 40 via a bearing. It is attached so that it can rotate in a vertical plane with respect to the rear portion of the.

The upper crank motor (upper crank drive means) 46 is a servo motor, and drives the drive side crankshaft 45a to rotate up and down the table 40 under the control of the control panel 10. The state shown in FIG. 7 is a state in which the tables 30 and 40 are close to each other. When the motor 46 rotates the drive side crankshaft 45a counterclockwise within a predetermined angle (for example, 90 °) in FIG. 45b and 45c also rotate counterclockwise and raise the upper table 40. When the motor 46 rotates the drive-side crankshaft 45a clockwise within a predetermined angle (for example, 90 °) in FIG. 7 with the upper table 40 raised, the driven-side crankshafts 45b and 45c also rotate clockwise. Then, the upper table 40 is lowered.
In the present embodiment, the crankshaft spanned in the width direction of the sheet is arranged so as to be shifted from the upper side of the knockout member in the sheet conveying direction, so that the space above the upper table can be used effectively.

As shown in FIG. 13 and the like, a product transfer conveyor (product stacking table) 38 that is movable to a predetermined upper position L6 and a predetermined lower position L7 is assembled to the lower table 30 described above. The upper position L6 is generally a position that is in the ascending / descending space SP1 of the lower table, and is a position at which the sheet product S3 is stacked in the lower mold cavity C1 of the punching blade 32. The upper position L6 of the present embodiment is a position where the upper surface 38c of the product transfer conveyor contacts the lower surface of the mold base 34. The lower side position L7 is a position below the upper side position L6, and is a position where the upper surface 38c of the product transfer conveyor 38 passes through the lower table 30 and is aligned with the upper surface of the product discharge conveyor 71. Therefore, when the product transfer conveyor 38 moves from the upper position L6 to the lower position L7, the sheet product S3 can be transferred to the product discharge conveyor 71 in a stacked state.
The product transfer conveyor 38 according to the present embodiment is a belt conveyor in which an endless belt is wound around a plurality of rollers, and the sheet product S3 is stacked by the belt moving around by the operation of the product transfer conveyor drive motor 38a. Transport with. The product transfer conveyor drive motor 38a is a servo motor, and drives the belt in a loop according to the control of the control panel 10. In addition, a plate-like attachment member 38b for attaching a mechanism for raising and lowering the product transfer conveyor 38 is provided at a portion in the width direction D2 facing the elevation space SP1 in the product transfer conveyor 38.

As shown in FIG. 9 and the like, the above-described upper table 40 incorporates a knockout mechanism 60a that lowers the sheet product S3 punched by the punching blade 32 and stacks it on the product stacking table 38. The knockout mechanism 60a includes a knockout member 64, a knockout drive motor 66, and power transmission mechanisms 67a to 67d.
The knockout member 64 is disposed so as to be movable up and down from the ascending / descending space SP1 of the upper table 40 to the mold hole C2 of the receiving mold 41 with the longitudinal direction facing up and down, and the mold hole from above the sheet product S3 punched by the punching blade 32. It is possible to advance and retreat with respect to C1. The lower end 65 of the knockout member 64 has a flat shape that matches the shape of the sheet product S3. The lower end 65 of the knockout member can be moved up and down from the retracted position L4 shown in FIG. 9 to the protruding position L5 that has passed through the mold cavity C1 shown in FIG. The knockout member 64 is prevented from rotating around the axis by a holding structure (not shown).

The knockout drive motor 66 is a servo motor and raises and lowers the knockout member 64 according to the control of the control panel 10. A drive pulley 67 a is attached to the rotation shaft of the knockout drive motor 66.
A ball screw 67d whose longitudinal direction is directed up and down is fixed to the upper end of the knockout member 64. The ball screw 67d is prevented from rotating around the axis by a holding structure (not shown). A driven pulley 67c is attached to the ball screw 67d.
An endless belt is wound around the pulleys 67a and 67c.

  As described above, when the knockout drive motor 66 rotationally drives the drive pulley 67a, the driven pulley 67c rotates through the belt 67b and moves up and down the ball screw 67d. Thereby, the knockout member 64 moves up and down.

  As shown in FIG. 17, the control panel 10 is provided with an operation unit 15 that constitutes a sheet thickness input unit (sheet thickness input means) 62 that receives an input of the thickness of the sheet S1. When the operation input of the thickness of the sheet S1 is received by the operation unit 15, the lower limit position L3 (see FIG. 24) of the knockout member 64 that is lowered every time the sheet product S3 is knocked out is the amount of the thickness input by the operation unit 15. It rises one by one. Thereby, the stacked state of the sheet product S3 is more reliably maintained.

  Furthermore, as shown in FIG. 27, when the product transfer conveyor 38 moves from the upper position L6 to the lower position L7, the knockout member 64 moves down until the lower end 65 of the knockout member passes through the mold cavity C1, and the product transfer conveyor. The sheet product S3 stacked on 38 is pressed. Also by this, the stacked state of the sheet product S3 is more reliably maintained, and the sheet product S3 is carried out while maintaining the stacking posture of the sheet product S3.

By the way, the punching means 50 of this embodiment has a mark position detecting means 56 for detecting the position of the mark S13 of the sheet S1 carried into the punching position L1.
As shown in FIG. 5, the mark position detecting means 56 includes an imaging device 56a and an image processing unit 56b. The imaging device 56a is, for example, a digital camera in which a large number of imaging elements such as a CCD (Charge Coupled Device) are arranged, and a sheet in a predetermined range corresponding to a predetermined number of shots NB (NB is a positive integer) from the punching position L1. Image S1. In the example shown in FIG. 5, NB = 3. The predetermined range is a range including the mark S11 and its periphery with the mark S13 as the center if there is no positional deviation of the mark S13. The image to be captured is an image in which a large number of pixels are arranged corresponding to the image sensor. The image processing unit 56b is provided in the control panel 10, and detects the position YM in the width direction D2 and the position XM in the transport direction D1 of the mark S13 based on the image captured by the imaging device 56a. For example, it is possible to detect the position of the mark by extracting a pixel representing the darkness of the mark from the captured image and obtaining the position of the central portion of these pixels in the captured image.

The punching means 50 stops punching of the sheet product S3 when the position YM of the mark S13 detected by the image processing unit 56b is out of the reference with respect to the sheet width direction D2. For example, the allowable range is ± Y1 (Y1> 0) with respect to the reference position Y0 in the width direction D2 of the sheet S1, and the deviation YM-Y0 in the width direction D2 of the mark S13 detected by the image processing unit 56b is ΔY. In this case, when the position in the width direction D2 of the sheet S1 is out of the reference, that is, ΔY <−Y1 or Y1 <ΔY, the punching of the sheet product S3 is stopped, and the sheet S1 is only conveyed by one shot. .
Further, the punching unit 50 stops the conveyance of the sheet S1 when the position of the mark S13 detected by the image processing unit 56b is out of the reference in the sheet width direction D2 for a predetermined number of times.

Further, when the position XM of the mark S13 detected by the image processing unit 56b is out of the reference with respect to the transport direction D1 of the sheet S1, the punching unit 50 sets the transport amount of the sheet S1 to be transported to the punch position L1. The position of the sheet S1 in the transport direction D1 is adjusted to a transport amount that is within the reference. For example, the allowable range is ± X1 (X1> 0) with respect to the reference position X0 in the conveyance direction D1 of the sheet S1, and the deviation XM-X0 in the conveyance direction D1 of the mark S13 detected by the image processing unit 56b is ΔX. In this case, when the position of the sheet S1 in the transport direction D1 is out of the reference, that is, ΔX <−X1 or X1 <ΔX, the transport amount of the sheet S1 from the control panel 10 is used instead of the reference transport amount XS for one shot. A command to set XS−ΔX may be output to the transport motor 52a. Then, the transfer amount of the clamp chain 52 becomes XS−ΔX, and the position of the sheet S1 in the transport direction D1 is adjusted to be within the reference −X1 ≦ ΔX ≦ X1.
Note that when the positions of a plurality of marks are detected by one punching, for example, the conveyance amount of the sheet S1 may be adjusted by averaging the deviations in the conveyance direction D1 between the two positions.

From the above, the punching accuracy of the sheet product S3 in the width direction D2 and the conveyance direction D1 of the sheet S1 is improved.
The main parts of the punching part 3 including the clamp chain 52, for example, the tables 30, 40, the crank mechanisms 35, 45, the mounting member 38b of the product transfer conveyor, the knockout member 64, the endless chain 52b, etc. are mainly made of metal. Can be formed by processing.

(6) Explanation of product take-out part 7:
As shown in FIGS. 1 and 2, the stacked product transfer means 70 has a product discharge conveyor 71 that can discharge the sheet product S3 from the product transfer conveyor 38 at the lower position L7 to the take-out position L2 in a stacked state. is doing. The product discharge conveyor 71 of the present embodiment is composed of a plurality of conveyors in order to shift the discharged sheet product S3 from below the scrap sheet S2. Each of the conveyors is a belt conveyor in which an endless belt is wound around a plurality of rollers, and the belt is rotated by the operation of the product discharge conveyor drive motor 71a to transfer the sheet product S3 in a stacked state. The product discharge conveyor drive motor 71a is a servo motor, and drives the belt to rotate in accordance with the control of the control panel 10. A product detection sensor 71b for detecting that the stacked sheet product S3 has arrived at the take-out position L2 is attached to the product discharge conveyor 71 at the take-out position L2. The product discharge conveyor drive motor 71a stops when the stacked sheet product S3 is detected by the product detection sensor 71b.

  The stacked product transfer means 70 moves the product transfer conveyor 38 from the upper position L6, which is in the lift space SP1 of the lower table, to the lower position L7, which is lower than the lift space SP1, and the product transfer conveyor 38 In the state where the sheet product S3 is stacked, the sheet product S3 is moved to the product discharge conveyor 71 and discharged to the take-out position L2. Thereby, the manufacturing efficiency of the stacked sheet product S3 is improved. Further, since the product transfer conveyor 38 on which the sheet products S3 are stacked is lowered, the sheet products S3 are discharged to the extraction position L2, so that the degree of freedom of the extraction position L2 of the stacked sheet products S3 is improved.

As shown in FIGS. 12 to 16, the stacked product transfer means 70 has mechanisms 72 to 74 for raising and lowering the product transfer conveyor 38 with respect to the lower table 30.
As shown in FIG. 15, a pair of rail members (guide portions) 72 and 72 whose longitudinal direction is directed upward and downward are fixed to the mounting member 30b of the lower table 30, and the driving pulley 74b and the driven pulley 74c are rotatable. It is attached. An endless belt 74d is wound around the pulleys 74b and 74c. An L-shaped connecting member 74e is attached to the belt 74d.
A pair of guide members (guided portions) 73 and 73 guided in the vertical direction D3 along the rail members 72 and 72 are fixed to the mounting member 38b of the product transfer conveyor 38, and a connecting member 74e is fixed. . The guide member 73 is fixed to the product transfer conveyor 38 at positions where the transfer conveyor 38 is at the upper position L6 and the lower position L7.

As shown in FIG. 16, a product transfer conveyor elevating motor 74a that rotationally drives the drive pulley 74b is attached to the attachment member 30b of the lower table. The product transfer conveyor lifting / lowering motor 74a is a servo motor and rotates the drive pulley 74b according to the control of the control panel 10.
Each part 74a-74e mentioned above comprises the product conveyance conveyor raising / lowering drive means 74 which makes the guide member 73 guide the rail member 72, and drives the product conveyance conveyor 38 to the up-down direction D3.

When the product transfer conveyor lifting / lowering motor 74a rotationally drives the drive pulley 74b, the belt 74d rotates and the driven pulley 74c rotates. At this time, the connecting member 74e moves up and down, the guide member 73 is guided by the rail member 72, and the product transfer conveyor 38 moves up and down.
The stacked product transfer means 70 lowers the product transfer conveyor 38 from the upper position L6 to the lower position L7 by the product transfer conveyor lifting / lowering drive means 74, and drives the product transfer conveyor 38 to transfer the sheet product S3 from the product transfer conveyor 38. In a stacked state, the product is moved to the product discharge conveyor 71 and discharged to the take-out position L2.
From the above, the manufacturing efficiency of the stacked sheet product S3 is improved.

(7) Explanation of the scrap collection unit 9:
As shown in FIG. 1, the scrap collection device 90 transfers and collects the scrap sheet S2 generated from the sheet S1 around the sheet product S3 in the traveling direction D1 while being connected to the sheet S1. The scrap collecting device 90 is constituted by a rotary motor or the like, and rotates the winding shaft of the scrap sheet S2 according to the control of the control panel 10 to wind the scrap sheet S2 in a predetermined rotation direction.

(8) Description of control panel 10:
FIG. 17 shows an electric circuit configuration of the punching device 1 with the control panel 10 as the center. Each part of the punching device 1 shown in FIG. 18, the imaging device 56 a, the scrap collection device 90, and the like are electrically connected to the control panel 10. The control panel 10 includes a central control circuit 11 that controls the operation of the entire control panel, an I / O circuit (input / output circuit) 10a that inputs and outputs signals to each part of the punching apparatus 1, and an image that processes a captured image. A processing unit 56b, a scrap collection control unit 12 that controls the operation of the scrap collection device 90, an alarm output unit 13, an information output unit 14, an operation unit 15, and the like are provided.

The central control circuit 11 is a circuit in which a CPU (Central Processing Unit) 11a, semiconductor memories 11b and 11c, a timer circuit 11d, a nonvolatile memory 11e, and the like are connected to an internal bus. The CPU 11a controls each part of the punching apparatus 1 using a RAM (Random Access Memory) 11c as a work area based on a control program recorded in a ROM (Read Only Memory) 11b or a nonvolatile memory.
The alarm output unit 13 outputs an alarm to the outside. To output an alarm to the outside, to output a predetermined alarm sound such as a buzzer sound, to turn on lighting such as a light bulb, to print a predetermined alarm content on printing paper, a combination of these, Etc. are included. The information output unit 14 includes, for example, a display, an audio output device, and a printer, and outputs various types of information indicating the contents of various settings that have received an operation input from the user and the operation status of the punching device 1 by display or the like. The operation unit 15 includes, for example, a plurality of buttons, and receives an operation input from the user.

As shown in FIG. 18, the I / O circuit 10a includes a lower crank motor 36, an upper crank motor 46, a transport motor 52a, a knockout drive motor 66, a product transfer conveyor lifting motor 74a, and a product transfer conveyor drive motor. 38a and the product discharge conveyor drive motor 71a are connected.
The control panel 10 constitutes the punching means 50 together with the clamp chain 52 and the imaging device 56a, constitutes the knockout means 60 together with the knockout mechanism 60a, and together with the product discharge conveyor 71 and the mechanisms 72-74 for raising and lowering the product transfer conveyor. The stacked product transfer means 70 is configured.

(9) Operation, action and effect of punching device:
The control panel 10 of the present embodiment performs a punching process according to the flowcharts shown in FIGS. Each step in these flowcharts is denoted by a corresponding means. Hereinafter, the operation, action, and effect of the punching apparatus 1 will be described with reference to FIGS.

FIG. 19 shows a setting process performed by the control panel 10. This process is started when a predetermined operation for starting the setting process is performed on the operation unit 15. When the process is started, the control panel 10 outputs the setting screen DI1 shown in the flowchart from the information output unit 14 (step S102; hereinafter, description of “step” is omitted). The setting screen DI1 is provided with input fields for various setting values. The “knockout initial lower limit position” (Z0) represents the lower limit position of the knockout operation when it is assumed that there is no sheet product S3 on the product transfer conveyor 38. From the upper surface of the product transfer conveyor 38 at the upper position L6 It means the height to the lower end 65 of the knockout member. “Film thickness” (T) means the thickness of the sheet S1 (same for the sheet product S3). “Stack number” (referred to as NS) means the number of stacked sheet products S3 discharged to the take-out position L2. In the input column of these items, an operation input is accepted so that the maximum height Z0 + T × NS from the upper surface of the product transfer conveyor is less than the height H of the punching blade lower edge 32c from the upper surface of the product transfer conveyor. Has been. As a result, the lower end 65 of the knockout member is lowered to the lower side of the punching blade 32.
The setting screen DI1 is also provided with an input field for other setting values.

  When a set value is operated and input in various input fields and a predetermined operation for storing the set value is performed on the operation unit 15, the control panel 10 stores the various set values input in the input field in a nonvolatile memory. 11e (S104), and the setting process is terminated.

20 to 22 show a manufacturing process performed by the control panel 10. This process starts when a predetermined operation for starting the manufacturing process is performed on the operation unit 15.
It is assumed that the sheet S1 held by the clamp chain 52 is disposed at the punching position L1 and is stopped.
When the processing is started, the control panel 10 performs necessary preprocessing before stacking the sheet product S3 (S202). The pre-stacking process is a process of causing each part of the punching device 1 to be in the state shown in FIG. 9 and resetting various variables provided in the RAM 11c. At this time, the sheet product S3 is not placed on the product transfer conveyor 38. In S202, the product transfer conveyor lifting / lowering motor 74a is driven as necessary to place the product transfer conveyor 38 in the upper position L6, and the punching counter CC, the width direction non-reference counter CY provided in the RAM 11c, and the transfer 0 is substituted into the direction deviation amount ΔX. In S204, the knockout drive motor 66 is driven as necessary to place the knockout member 64 at the retracted position L4. In S206, the upper and lower tables 30, 40 are separated by driving the crank motors 36, 46 as necessary. That is, the crankshaft of the lower crank mechanism 35 shown in FIG. 7 is turned clockwise, and the crankshaft of the upper crank mechanism 45 is turned counterclockwise. At this point, each part of the punching device 1 except for the sheet product S3 is disposed at the position shown in FIG.

In S208, the conveyance amount X of the sheets S1 and S2 is set. That is, a value obtained by subtracting the conveyance direction deviation amount ΔX from the reference conveyance amount XS for one shot is substituted into the variable X. In S210, a command to transfer the sheets S1 and S2 in the transport direction D1 so as to be the set transport amount X is output to the transport motor 52a, and the clamp chain 52 is driven to rotate to transport the sheets S1 and S2 by the transport amount X. To do. Thereby, the conveyance amount of the sheet S1 carried into the punching position L1 is adjusted to a conveyance amount that is within the reference.
In S212, a predetermined range of sheets S1 corresponding to a predetermined number of shots NB from the punching position L1 is imaged by the imaging device 56a, the captured image is input from the imaging device 56a, and the image processing unit 56b is based on the captured image. A position YM in the width direction D2 and a position XM in the transport direction D1 of the mark S13 are detected. In S214, the positions XM and YM of the detected mark S13 are within the reference, that is, the positional deviations ΔX = XM−X0 and ΔY = YM−Y0 of the mark S13 are −X1 ≦ ΔX ≦ X1 and −Y1 ≦ ΔY ≦ Y1. It is determined whether or not the above is satisfied. When the condition is not satisfied, the process proceeds to S232 shown in FIG.

  When the condition is satisfied, the crank motors 36 and 46 are driven to bring the upper and lower tables 30 and 40 close to each other (S216). That is, the crank mechanisms 35 and 45 are in the state shown in FIGS. 7 and 8, the upper and lower molds 31 and 41 are close to each other as shown in FIG. 23, and the cutting edge 32b of the punching blade 32 pushes the sheet product S3 to the blade holder. The state hits 43. In this way, the sheet product S3 is punched from the sheet S1 at the punching position L1.

In S218, the lower limit position Z of the knockout member 64 is set, a command to lower the knockout member 64 so as to be the set lower limit position Z is output to the knockout drive motor 66, and the lower end 65 of the knockout member is moved as shown in FIG. Lower to the lower side of the punching blade 32. As a result, the sheet product S3 descends and is stacked on the product transfer conveyor 38. That is, the sheet product S3 is not held inside the punching blade 32 in which the inner periphery 32a below the blade edge 32b is set inside the blade edge 32b, but is one step below the punching blade 32. The portions surrounded by the expanded base inner peripheries 33a and 34a are sequentially stacked on the product transfer conveyor 38. Accordingly, when the knockout member 64 rises in S204, the sheet product S3 is unlikely to return to the upper side of the punching blade 32, and the sheet product with the edge cut is less likely to be mixed into the stack of the sheet product S3.
In S218, (knockout initial lower limit position Z0) + (film thickness T) × (punching counter CC) is substituted for variable Z, and lower limit position L3 of knockout member 64 that is lowered every time the sheet product S3 is knocked out is set. The film thickness is increased by T. Therefore, the stacked state of the sheet product S3 is more reliably maintained.

In S220, the value of the punching counter CC is incremented by one. Therefore, the punching counter CC is a counter that counts the number of times the sheet product S3 is punched from the state where the sheet product S3 is not placed on the product transfer conveyor 38.
In S222, 0 is substituted into the width direction non-reference counter CY and the conveyance direction deviation amount ΔX. In S224, it is determined whether or not the punching counter CC has reached the stack number NS. When the condition is satisfied, the process proceeds to S252 in FIG. When the condition is not satisfied, the process returns to S204 to raise the knockout member 64 to the retracted position L4, move the tables 30 and 40 apart (the state shown in FIG. 25), convey the sheets S1 and S2, and bring the tables 30 and 40 close to each other. A series of processes for lowering the knockout member 64 to the lower limit position L3 is repeated.

FIG. 21 shows processing performed by the control panel 10 when the condition is not satisfied in S214, that is, when the position of the mark S13 is out of the reference.
In S232, a value obtained by subtracting the reference position X0 in the conveyance direction of the sheet S1 from the detection position XM in the conveyance direction of the mark S13 is substituted into a variable ΔX. Thus, the set transport amount X is adjusted in S208, and the transport amount of the sheet S1 carried into the punching position L1 is adjusted to a transport amount that is within the reference.

In S234, it is determined whether or not the detected position YM in the width direction D2 of the mark S13 is out of the reference, that is, ΔY <−Y1 or Y1 <ΔY. When the condition is not satisfied, the process returns to S208 shown in FIG. Accordingly, when the detected position of the mark S13 is out of the reference with respect to the sheet width direction D2, punching of the sheet product S3 is suspended.
When the condition is satisfied, the value of the width direction non-reference counter CY is increased by 1 (S236), and it is determined whether or not the width direction non-reference counter CY has reached a predetermined number of times M (M is an integer equal to or greater than 2, for example, M = 5). (S238). When the condition is not satisfied, the process returns to S208 shown in FIG. When the condition is satisfied, an alarm is output from the alarm output unit 13 (S240), and the process waits until a predetermined operation for canceling the alarm is performed on the operation unit 15 (S242), and the process returns to S208 shown in FIG. Accordingly, the conveyance of the sheet S1 is stopped when the position of the detected mark S13 becomes out of the reference continuously M times (predetermined number of times).
By performing the processing shown in FIG. 21, the punching accuracy of the sheet product S3 in the width direction D2 and the conveyance direction D1 of the sheet S1 is improved.

FIG. 22 shows that the condition is satisfied in S224, that is, the sheet product S3 stacked on the product transfer conveyor 38 is taken out when the number of times of punching the sheet product S3 reaches the stack number NS (predetermined number). The process of moving to the position L2 is shown.
When the punching counter CC reaches the stack number NS, NS sheet products S3 are stacked on the product transfer conveyor 38 as shown in FIG. In S <b> 252, a command to lower the knockout member 64 while applying torque limitation is output to the knockout drive motor 66. Accordingly, the knockout member 64 presses the NS sheet product S3 on the product transfer conveyor 38 downward.

In S254, a command to lower the product transfer conveyor 38 to the lower position L7 is output to the product transfer conveyor lifting / lowering motor 74a, and the product transfer conveyor 38 is lowered from the upper position L6 to the lower position L7. Here, as shown in FIG. 27, the knockout member 64 descends to the protruding position L5 where the lower end 65 has passed through the mold cavity C1, and presses the sheet product S3 stacked on the product transfer conveyor 38. In this way, since the sheet product S3 stacked on the product transfer conveyor 38 is pressed by the knockout member 64 until it passes through the mold cavity C1, the stacked state of the sheet product S3 is more reliably maintained. Therefore, the punching apparatus 1 can carry out the sheet product S3 while maintaining the stacking posture of the sheet product S3. Then, as shown in FIG. 28, the product transfer conveyor 38 descends and stops to a lower position L7 where the sheet product S3 can be transferred to the product discharge conveyor 71.
In S256, a command to raise the knockout member 64 to the retracted position L4 is output to the knockout drive motor 66, and the knockout member 64 is raised from the protruding position L5 to the retracted position L4.

  In S258, a command for driving the product transfer conveyor 38 in the transfer direction D1 is output to the product transfer conveyor drive motor 38a, and a command for driving the product discharge conveyor 71 from the product transfer conveyor 38 toward the take-out position L2 is issued. It outputs to the drive motor 71a and makes both conveyors 38 and 71 circulate. As a result, the sheet product S3 is moved from the product transfer conveyor 38 to the product discharge conveyor 71 while being stacked, and is discharged to the take-out position L2. When the product detection sensor 71b at the take-out position L2 detects the arrival of the sheet product S3, the product discharge conveyor drive motor 71a stops the circular drive of the product discharge conveyor 71. Since the NS sheet product S3 is moved to the take-out position L2 in this manner, the punching apparatus is convenient and can efficiently produce the stacked sheet product S3.

  In S260, the operation of the product transfer conveyor drive motor 38a is stopped, and the product transfer conveyor 38 is stopped. Thereafter, the process returns to S202 in FIG. 20 to perform processing for manufacturing the next stack of the sheet product S3.

As described above, the inner periphery 32a below the cutting edge 32b of the punching blade 32 is set to the inside of the cutting edge 32b, and the inner periphery 33a, 34a of the lower punching die base is the inner periphery of the punching blade. It is outside of 32a. Accordingly, when the lower end 65 of the knockout member is lowered to the lower side of the punching blade 32, the sheet product S3 is difficult to return toward the punching blade 32, and the sheet product with the edge cut is mixed into the stack of the sheet product S3. Hard to do.
Further, in the punching device described in JP-A-2006-192513, since it is necessary to transfer the sheet product stacked inside the Thomson hollow blade from the punching station to the take-out station, it is possible to start from an extremely thin sheet like a film. When a film product is punched, there is a concern that the film product falls from the Thomson hollow blade at the punching station. Since the punching device 1 of the present embodiment is stacked on the product transfer conveyor 38 at the position L1 where the sheet product S3 is punched, there is no concern that the sheet product will drop at the punching position.
Further, since the punching device 1 punches the sheet product S3 with the punching blade 32, the sheet product S3 in the punching blade 32 passes completely downward and is stacked on the product transfer conveyor 38. The stability of the stacked state of the sheet product S3 is good.
Further, since the punching apparatus 1 performs punching and stacking of the sheet product S3 at the same punching position L1, the punching blade positioning accuracy is good, the punching blade life is improved, and a series of Processing cyclo-time can be shortened.
Therefore, the punching apparatus and punching method of the present embodiment can efficiently manufacture the stacked sheet products S3.

In addition, according to the above-described embodiment, the present invention is a punching method in which a continuous sheet is carried in a conveyance direction to a punching position between a lower punching die and an upper receiving portion, and sheet products are punched and stacked from the sheet. Extracting device,
The punching die has a mold hole through which the sheet product passes vertically,
This punching device
An upper position where the sheet products are stacked in the mold cavity, and a product stacking platform which is movable to a lower position below the upper position;
A punching means for separating the punching die and the receiving portion, carrying the sheet into the punching position, and punching the sheet product from the sheet at the punching position by bringing the punching die and the receiving portion close to each other. When,
The sheet product has a knockout member that can be moved back and forth with respect to the mold cavity from above, and the sheet product is lowered by lowering the knockout member to be stacked on the product stack in the upper position. Sheets stacked on the product stack by lowering the knockout member until the lower end of the knockout member passes through the mold cavity when the product stack is moved from the upper position to the lower position. Knockout means to hold down the product,
And a stacked product transfer means for moving the product stack from the upper position to the lower position and moving sheet products stacked on the product stack to a predetermined take-out position. Of course, this invention also has the side of the punching method corresponding to the said punching apparatus.

In the punching device described in JP-A-2006-192513, there is a concern that the sheet product may fall from the Thomson hollow blade at the punching station. Therefore, the punching apparatus disclosed in this publication is troublesome to manage the number of sheet product stacks.
On the other hand, when the product stacking platform moves from the upper position to the lower position, the punching device is lowered and stacked on the product stacking platform until the lower end of the knockout member passes through the mold cavity. Sheet product is held down. Therefore, it is possible to provide a punching device capable of more reliably maintaining the stacked state of the sheet products.

Further, the present invention is a punching device for carrying a continuous sheet in the transport direction to a punching position between a lower punching die and an upper receiving part, punching out sheet products from the sheet, and stacking them.
The punching die has a mold hole through which the sheet product passes vertically,
This punching device
A lower table with the punching die fixed at the top;
A product transfer conveyor that is movable to an upper position where the sheet product is stacked in the mold cavity, and a lower position below the upper position;
A punching means for separating the punching die and the receiving portion, carrying the sheet into the punching position, and punching the sheet product from the sheet at the punching position by bringing the punching die and the receiving portion close to each other. When,
A knockout means that has a knockout member that can be moved back and forth with respect to the mold cavity from above the sheet product, and lowering the knockout member to lower the sheet product and stacking it on the product transfer conveyor at the upper position; ,
A guide portion fixed to one of the lower table and the product discharge conveyor with the longitudinal direction facing up and down, and the lower table and the product transfer conveyor at positions where the product transfer conveyor is the upper position and the lower position. A guided portion fixed to the other side of the guide and guided in the vertical direction along the guide portion, and a product transfer conveyor lifting / lowering drive means for driving the product transfer conveyor in the vertical direction by guiding the guided portion to the guide portion. And lowering the product transfer conveyor from the upper position to the lower position by the product transfer conveyor lifting / lowering drive means, and driving the product transfer conveyor to stack the sheet products stacked on the product transfer conveyor. It has a side surface provided with a stacked product transfer means for moving to a predetermined take-out position. Of course, this invention also has the side of the punching method corresponding to the said punching apparatus.

In the punching device described in JP-A-2006-192513, there is a concern that the sheet product may fall from the Thomson hollow blade at the punching station. Therefore, the punching apparatus disclosed in this publication is troublesome to manage the number of sheet product stacks.
On the other hand, the punching device stacks the punched sheet products on the product transfer conveyor at the punching position, and the product transfer conveyor descends to move the stack of sheet products to the take-out position. There is no concern about the product falling. Therefore, it is possible to provide a punching apparatus that can efficiently manufacture stacked sheet products.

Furthermore, the present invention is a punching device that carries in a continuous sheet in the transport direction to a punching position between a lower mold and an upper mold and punches and stacks sheet products from the sheet,
A lower table capable of moving up and down with the lower mold fixed to the upper part;
A crank mechanism for raising and lowering the lower table;
Crank driving means for driving the crank mechanism to raise and lower the lower table;
The lower table is lowered by the crank driving means to separate the lower mold from the upper mold, the sheet is carried into the punching position, and the lower table is raised by the crank driving means. And punching means for punching out the sheet product from the sheet at the punching position by bringing the upper mold close to the upper mold,
The crank mechanism is
A drive-side crankshaft that is displaced in the conveying direction from below the punching position and is arranged with its longitudinal direction facing the width direction of the sheet;
A first driven-side crankshaft and a second driven-side crankshaft disposed in the width direction of the sheet at both positions on the outer side in the width direction of the sheet from below the punching position;
A first drive-side connecting rod spanned between the drive-side crankshaft and the first driven-side crankshaft;
A second drive side connecting rod spanned between the drive side crankshaft and the second driven side crankshaft;
A first driven connecting rod spanned between the first driven crankshaft and the lower table;
Having a second driven side connecting rod spanned between the second driven side crankshaft and the lower table;
The crank driving means has a side surface that lifts and lowers the lower table by rotationally driving the driving side crankshaft. Of course, this invention also has the side of the punching method corresponding to the said punching apparatus.

In the punching device described in Japanese Patent Laid-Open No. 2006-192513, a rotating shaft (crankshaft) spanning in the width direction of the sheet is provided below the punching position. Therefore, it is difficult to use the space below the punching position.
On the other hand, since the crankshaft spanned in the width direction of the sheet is arranged so as to be shifted from the lower side of the punching position in the sheet conveying direction, the punching apparatus effectively uses the space below the punching position. Can do.

(10) Modification:
Various modifications of the present invention are conceivable.
The receiving part of the punching die may be a cutter or the like that cuts the sheet by sliding contact with the punching blade.
One of the tables 30 and 40 may be fixed so as not to move. That is, to separate the lower table from the upper table, move both tables to release them, move the lower table away from the upper table without moving the upper table, and move the upper table without moving the lower table. Separating the table from the lower table. To move the lower table and the upper table closer, move both tables closer to each other, move the lower table closer to the upper table without moving the upper table, and move the upper table without moving the lower table. Approaching the lower table.
The product transfer conveyor may be movable to a position other than the upper position and the lower position.
The product stacking platform may be a conveyor other than a belt conveyor, or may be a platform for passing a stack of sheet products to a transfer arm or the like.
When knocking out the sheet product, the knockout member may be lowered to a position where the lower end of the knockout member presses down the sheet product stacked on the product stacking table.
The rail member (guide part) constituting the stacked product transfer means may be fixed to the product discharge conveyor, and the guide member (guided part) may be fixed to the lower table.
The order of the steps of the processes shown in FIGS. 19 to 22 can be changed as appropriate. For example, the knockout member retracting process in S204 and the table separation process in S206 may be reversed in order or performed simultaneously.

As shown in FIG. 29, a cutting die 131 in which a die in which a blade portion 132 and a base portion 133 are integrated is attached to a die base (a part of the base portion) 34 may be attached to the lower table 30. In this case, the blade portion 132 is a portion of the integrated mold in which the inner periphery 132a below the blade edge 132b is set inside the blade edge 132b. The base 133 is a part of the integrated mold excluding the part corresponding to the punching blade 32 shown in FIG. 10, but the inner periphery 133a below the blade part 132 is more than the inner periphery 132a of the blade part. Is also outside.
Even when such a punching die 131 is used, if the lower end of the knockout member is lowered to the lower side of the blade portion 132 so that the sheet product S3 is lowered and stacked on the product stacking table 38, the above-described action is achieved. The effect is obtained.

Note that the above-described basic functions and effects can be obtained even with an apparatus and method that have only the constituent elements according to the independent claims (including the aspects described in the embodiments) without the constituent elements according to the dependent claims. It is done.
Needless to say, the present invention is not limited to the above-described embodiments and modifications, and the configurations disclosed in the above-described embodiments and modifications are mutually replaced, the combinations are changed, the known technology, and the above-described embodiments. Configurations in which the respective configurations disclosed in the embodiment and the modified examples are mutually replaced or combinations are changed are also included.

1 ... Punching device,
2 ... sheet supply unit, 3 ... punching unit, 7 ... product take-out unit, 9 ... scrap recovery unit,
10 ... Control panel,
21 ... tension holding device,
24. Sheet edge position detection sensor (sheet edge position detection means),
25 ... Width direction position adjusting means, 26 ... Controller, 27 ... Centering mechanism,
30 ... Lower table, 30b ... Mounting member,
31 ... Punching die,
32 ... Punching blade (blade part), 32a ... Inner circumference, 32b ... Cutting edge, 32c ... Lower edge, 32d ... Outer circumference,
33 ... Holding member (base part), 33a ... Inner circumference, 33b ... Blade holding surface, 33c ... Step part,
34 ... Mold base (base), 34a ... Inner circumference,
35 ... Lower crank mechanism, 35a ... Drive side crankshaft,
35b ... 1st driven side crankshaft, 35c ... 2nd driven side crankshaft,
35d ... first drive side connecting rod, 35e ... second drive side connecting rod,
35f ... 1st driven side connecting rod, 35g ... 2nd driven side connecting rod,
36 ... Lower crank motor (lower crank driving means),
38 ... Product transfer conveyor (product stack),
38a ... Product transfer conveyor drive motor, 38b ... Mounting member, 38c ... Top surface,
40 ... Upper table,
41 ... receiving mold (receiving section), 42 ... receiving mold main body, 43 ... blade receiving,
50 ... punching means,
52 ... Clamp chain (conveying means), 52a ... Conveying motor,
56 ... Mark position detecting means, 56a ... Imaging device, 56b ... Image processing unit,
60 ... Knockout means, 60a ... Knockout mechanism,
62 ... Sheet thickness input section (sheet thickness input means),
64 ... Knockout member, 65 ... Lower end, 66 ... Knockout drive motor,
70 ... means for transferring stacked products,
71 ... Product discharge conveyor,
71a ... Product discharge conveyor drive motor, 71b ... Product detection sensor,
72 ... rail member (guide part), 73 ... guide member (guided part),
74 ... Product transfer conveyor lifting / lowering drive means, 74a ... Product transfer conveyor lifting / lowering motor,
C1, C2 ... mold cavity,
D1 ... transport direction, D2 ... width direction, D3 ... vertical direction,
L1 ... Punching position, L2 ... Picking position,
L3 ... lower limit position, L4 ... retracted position, L5 ... protruding position,
L6: upper position, L7: lower position,
L11: Position shifted from the bottom of the product stacking platform in the transport direction,
L12: A position that is on the outer side in the width direction of the sheet from below the product stack,
S1 ... sheet, S1a ... edge, S2 ... scrap sheet, S3 ... sheet product,
S11 ... pattern, S12 ... lead wire, S13 ... mark,
SP1, SP2 ... Elevating space.

Claims (14)

A punching device that carries a continuous sheet (including a film) in a conveying direction to a punching position between a lower punching die and an upper receiving part, punches out and stacks sheet products from the sheet,
The punching die has a mold hole through which the sheet product passes vertically,
The punching die is
A blade part whose upper edge is directed to the upper side and whose inner periphery below the blade edge is set to the inner side of the blade edge; and
The inner periphery below the blade portion has a base portion that is outside the inner periphery of the blade portion, and
This punching device
A product stack placed below the mold cavity;
A punching means for separating the punching die and the receiving portion, carrying the sheet into the punching position, and punching the sheet product from the sheet at the punching position by bringing the punching die and the receiving portion close to each other. When,
A knockout member which can be moved back and forth with respect to the mold cavity from above the sheet product, and lowering the lower end of the knockout member to the lower side of the blade portion to lower the sheet product and thereby the product stacking base Knock-out means stacked on top,
A punching apparatus comprising: stacked product transfer means for moving sheet products stacked on the product stacking platform to a predetermined take-out position. The product stack is movable to an upper position where the sheet product is stacked in the mold cavity below the blade portion, and a lower position below the upper position,
The stacked product transfer means includes a product discharge conveyor capable of discharging the sheet product from the product stack in the lower position to the take-out position in a stacked state, and the product stack is 2. The apparatus according to claim 1, wherein the sheet product is moved from the upper position to the lower position, and the sheet product is moved from the product stacking table to the product discharge conveyor in a stacked state, and discharged to the take-out position. Punching device.   When the product stacking platform moves from the upper position to the lower position, the knockout means lowers the knockout member until the lower end of the knockout member passes through the mold cavity, so that the knockout means moves on the product stacking platform. The punching device according to claim 2, wherein the sheet product stacked on the sheet is pressed. A lower table is provided in which the punching die is fixed to the upper part, and a lifting space connected to the die hole of the punching die is formed in the lifting space of the product stacking platform,
The stacked product transfer means lowers the product stack from the upper position in the lift space to the lower position below the lift space, from the product stack to the 4. The punching device according to claim 2, wherein the sheet product is moved to the product discharge conveyor in a stacked state and discharged to the take-out position. The product stacking platform is a product transfer conveyor that can transfer the sheet product to the product discharge conveyor in a stacked state when moving from the upper position to the lower position,
The stacked product transfer means includes:
A guide portion fixed to one of the lower table and the product discharge conveyor with the longitudinal direction facing up and down;
A guided portion fixed to the other of the lower table and the product transfer conveyor at a position where the product transfer conveyor is the upper position and the lower position, and guided in the vertical direction along the guide portion;
A product transfer conveyor lifting and lowering drive means for guiding the guided portion to the guide portion and driving the product transfer conveyor in the vertical direction;
The product transfer conveyor is lowered from the upper position to the lower position by the product transfer conveyor lifting / lowering drive means, and the product discharge is driven in a state where the sheet products are stacked from the product transfer conveyor by driving the product transfer conveyor. The punching device according to claim 4, wherein the punching device is moved to a conveyor and discharged to the take-out position.   The stacked product transfer means counts the number of times the sheet product is punched out from a state where the sheet product is not placed on the product stacking platform, and the product stack when the counted number reaches a predetermined number. The punching device according to any one of claims 1 to 5, wherein the sheet product stacked on the platform is moved to a predetermined take-out position.   The base portion of the punching die has an inner periphery below the blade portion that is surrounded by the blade edge or larger than a size surrounded by the blade edge. The punching device according to any one of claims 6 to 6.   The knockout means has sheet thickness input means for receiving an input of the thickness of the sheet, and the lower limit position of the knockout member to be lowered every time the sheet product is knocked out is determined by the thickness input by the sheet thickness input means. The punching device according to any one of claims 1 to 7, wherein the punching device is raised step by step. A lower table that can be raised and lowered with the punching die fixed at the top;
A crank mechanism for raising and lowering the lower table;
Crank driving means for driving the crank mechanism to raise and lower the lower table is provided,
The crank mechanism is
A drive-side crankshaft arranged from the lower side of the product stacking base toward the conveying direction and having the longitudinal direction thereof oriented in the width direction of the sheet;
A first driven-side crankshaft and a second driven-side crankshaft disposed in the width direction of the seat at both positions on the outer side in the width direction of the seat from below the product stacking base,
A first drive-side connecting rod spanned between the drive-side crankshaft and the first driven-side crankshaft;
A second drive side connecting rod spanned between the drive side crankshaft and the second driven side crankshaft;
A first driven connecting rod spanned between the first driven crankshaft and the lower table;
Having a second driven side connecting rod spanned between the second driven side crankshaft and the lower table;
The punching device according to any one of claims 1 to 8, wherein the crank driving means lifts and lowers the lower table by rotationally driving the driving side crankshaft.   The punching device according to any one of claims 1 to 9, wherein the punching unit includes a transporting unit that holds both edges in the width direction of the sheet and transports the sheet in the transporting direction. Unplugging device. Sheet edge position detecting means for detecting the position of the edge of the sheet before being held by the conveying means;
The width direction position adjusting means for adjusting the position in the width direction of the sheet held by the conveying means within a reference based on the detected position of the sheet edge portion is provided. The punching device described. The sheet is a sheet having a mark representing a reference position in the width direction,
The punching means includes mark position detection means for detecting the position of the mark of the sheet carried into the punching position, and the detected position of the mark is out of the reference with respect to the width direction of the sheet. The sheet product punching is stopped when the sheet position is detected, and the position of the mark detected by the mark position detecting means is continuously out of the reference in the width direction of the sheet for a predetermined number of times. The punching apparatus according to any one of claims 1 to 11, wherein the conveyance of the punching is stopped. The sheet is a sheet having a mark representing a reference position in the transport direction,
The punching means includes mark position detection means for detecting the position of the mark of the sheet carried into the punching position, and the detected position of the mark is out of the reference with respect to the sheet conveyance direction. 13. The conveyance amount of the sheet that is carried into the punching position when the sheet is moved is adjusted to a conveyance amount in which the position in the conveyance direction of the sheet is within a reference. 13. The punching device described in 1. A punching method in which a sheet (including a film) continuous in a conveying direction is carried into a punching position between a lower punching die and an upper receiving part, and sheet products are punched from the sheet and stacked.
A blade part in which a die hole penetrating vertically through the sheet product is provided in the punching die, a blade edge for contact with the sheet is directed upward, and an inner periphery below the blade edge is set inside the blade edge Is provided in the punching die, and a base is provided in the punching die whose inner periphery is lower than the inner periphery of the blade part,
Place a product stack under the mold cavity,
The punching die and the receiving portion are separated from each other, the sheet is carried into the punching position, the punching die and the receiving portion are brought close to each other, and the sheet product is punched from the sheet at the punching position. The sheet product is lowered by lowering the lower end of a knockout member that can be moved back and forth with respect to the mold cavity from the top of the product to the lower side of the blade portion, and is stacked on the product stacking base. A punching method, wherein the sheet product stacked on the top is moved to a predetermined take-out position.

Images